Wildeioh winteehaltee



NrTED STATES ATEN'I QFFICE.

CONVEYER.

SPECIFICATION forming part of Letters Patent 110,238,194, dated February 22, 1881.

Application filed November 20, 1880. (No modeL) To all whom it may concern:

Be it known that I, WILDRIOH WINTER- HALTER, a subject of the King of Bavaria, residing at San Francisco, in the county of San Francisco and State of California, have invented certain new and useful Improvements in Oonveyers; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled inthe art to which it appertains to make and use the same, reference being bad to the accompanying drawings, and to the letters or figures of reference marked thereon, which form a part of this specification,

My invention relates to improvements in conveyers for conveying grain, middlings,sand, or other materials, in which the screw or parts constituting the screw are fastened to the insides of the conveyor tube or box, which made to revolve.

The objects of myimprovement are to omit the solid or hollow shafts used at present in conveyors, and also to allow the outside or parts of the outside of the revolving tube or box to be in the form of screens orperforated sheets for use of cleaning or separating the conveyed material, all parts of which are made, by the revolution of the conveyer-tube, to come in contact with its outside, as will be set forth.

In the drawings, Figure l is a side view of my conveyer; Fig. 2, a central longitudinal section; Fig. 3, a front view of the inlet. Fig. etshows the end view of outlet; Fig. 5, a trans verse section on line a; m of Fig. 1.

(J represents the conveyer box or tube, which may be a cylindrical shell in shape, as shown, or square, polygonal, &c., in cross-section, and of anylength necessary. It may be constructed of thin metal plates, or if itis desired to clean or separate the conveyed materials the plates are perforated; or it may consist of wire-netting. This cylinderis supported by'and turns in rings or hangers D, bolted to the ceiling or other support.

F is a toothed w-heel fastened to the outside g of the cylinder at one end, and engaging with a worm-wheel, G, and thusrotating said cylinder or box 0; orthe revolution of the same may be caused by any other suitable mechanism, (excepting always a central shaft with pulley or gearing attachedto it.) I

E represents the screw or conveyor, securely fastened to the inner side of the tube or cylinder O and revolving with it. This screw may be of greater or less pitch and varied depth, according to the purposes for which it is to be used. It may be of thin metal or other suitable material, and constructed in sections or otherwise, as desired. It is to be observed that the same is not attached to a shaft passing through a tube or box, as myimprovement does away with solid or hollow shafts now used in conveyers. The blades of the screw may not extend to the center line of the conveyer, and a kind of tube is thereby created (marked 11,) through which a current ofairfrom a blower can pass to separate the chafi', dust, 850., from the heavier materials by turning it out at the outlet B, or at openings of the box, which are made to open themselves when arrived at the highest point by the revolving, thus leaving the heavier stuff at the bottom.

The material to be conveyed is fed in at the inlet A, and is carried along by the screw as it revolves to the outlet B, where it falls into a hopper or other receptacle designed for it. In case the cylinder is perforated or of wirenett-ing and used as a separator, a series of hoppers is placed underneath it to receive the separated material of different degrees of fineness.

It will be seen that in myimproved conveyor there is less friction and wearing off between the screw, conveyed materials, and outsides, and consequently less movingpower is required than in conveyers now in use.

By means of my improvement any length of conveyer may be used without interfering with its revolving or beingintercepted by the journal-boxes, made necessary by shafts, as by my improvement all the appliances to revolve, to keep in place, or guide the conveyer-tube can be secured to or put on the outside of it entirely separate from the conveyed materials, which would be spoiled by friction, lubricating stuff, 850.

The conveyers now in use are workedwith screws, all of which are fastened to or are identical with the shafts, and I do not claim such central opening, H, substantially as and for construction; but the purposes shown and described. 10

What I do claim, and desire to secure by In testimony whereof I affix my signature Letters Patent, isin presence of two Witnesses. 5 In a conveyer, the combination, iifith the WILDRIOH WINTERHALTER.

hangers D D, external toothed whee], F, and Witnesses: worm-Wheel G, of the box or shell 0, provided JOHN RICHARDS, with an internal shaftless screw, E, having a OsoAR AsMUssEN. 

